There is a huge demand for ammonia worldwide due to its extensive utilization in various technical applications. However, its production is still dependent on the traditional Haber-Bosch process under high temperature and pressure, which has enormous pressure on both the world energy supply and global warming issue. In this work, bismuth molybdate nanosheets rich in oxygen vacancies were created via NaOH treatment of bismuth molybdate nanosheets by a simple, robust and cost-effective process of NaOH etching treatment at room temperature to boost the photocatalytic nitrogen fixation to produce ammonia under visible light illumination at room temperature and ambient pressure. It was found that rich oxygen vacancies largely improved both the photogenerated charge carrier separation and N₂ adsorption/activation capabilities of bismuth molybdate nanosheets. Thus, an enhanced, stable photocatalytic N₂ fixation performance with a superior average ammonia production rate of near 800 μmol·g^-1·h^-1 was achieved under visible light illumination in repeated uses. Even better photocatalytic N₂ fixation performance was observed under simulated solar illumination. The photocatalyst showed good tolerance to oxygen, allowing the use of air rather pure N₂ in the reaction. Thus, it is promising for ammonia production from the photocatalytic N₂ fixation with solar energy by these bismuth molybdate nanosheets with rich oxygen vacancies, which could provide a greener and more sustainable alternative than the traditional Haber-Bosch process.

由于氨在各种技术应用中的广泛应用，全球对氨的需求巨大。然而，其生产仍然依赖于高温高压下的传统哈伯-博世工艺，这对世界能源供应和全球变暖问题都具有巨大压力。在这项工作中，通过简单，耐用且经济高效的室温NaOH蚀刻处理工艺，通过可见光照射下氮的光催化固氮作用来生产氨，通过简单的，稳健且经济高效的NaOH处理，制备了富含氧空位的钼酸铋纳米片。在室温和环境压力下。发现富氧空位大大改善了光生载流子的分离和N _2。钼酸铋纳米片的吸附/活化能力。因此，在重复使用的可见光照射下，获得了增强的，稳定的光催化N ₂固定性能，具有近800μmol·g ^-1 ·h ^-1的平均氨产生率。在模拟太阳光下观察到更好的光催化N ₂固定性能。光催化剂显示出对氧气的良好耐受性，允许在反应中使用空气而不是纯N ₂。因此，有望由光催化N ₂产生氨。 这些具有丰富氧空位的钼酸铋铋纳米片可以固定太阳能，这比传统的哈伯-博世工艺更绿色，更可持续。